Working mandrel and method of rolling elongate hollow pieces in

Details Working mandrel and method of rolling elongate hollow pieces in Working mandrel and method of rolling elongate hollow pieces in

1981-08-04

1984-12-11

Larson, Lowell A.

Metal deforming

By use of roller or roller-like tool-element

With tool inside hollow work

72479, B21B 1704

Patent

active

044870493

ABSTRACT:
A working mandrel is composed of several similar sections, each having a working surface on the body thereof. The leading end of each section has a socket, while the trailing one has a projecting portion of a similar configuration for jointing the sections during the rolling step. Rolling is effected on the working mandrel assembled in a head-to-tail fashion and after the rolling cycle is terminated the leading section is transferred to the mandrel cooling and lubricating line and then, cooled and suitably lubricated, is positioned in front of the first roll stand, while the other sections remain between the first and the last roll stands. Put into position in front of the multistand mill may be a previously prepared section instead of that transferred to the mandrel cooling and lubricating line.

REFERENCES:
patent: 424213 (1890-03-01), Kellogg
patent: 829953 (1906-09-01), Dunn
patent: 1837161 (1930-08-01), Herz
patent: 2239085 (1941-04-01), Diescher
patent: 2384312 (1945-09-01), Kirchner

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